Math Is Fun Forum

Is there a rule for finding it ?

Yes I'm sure !

How do I figure out the determinant for a 3x3 what do the extra rows & columns in 4x4 represent?

What does Normalize do ?

What are 4x4 matrices, and I assume their is determinants within a 4x4 correct ?

Slowly it's making sense

I just put what you said in practice with matricies and vectors and although the first stage turned out to be garbage I did do something in my 3D program so I made slight progress

I don't understand 4x4 matrices and determinants and I'd like if you could give me a 3x3 matrix question for me to break down and solve. Normalize, Normalizes values as in to 1,2,3 etc ?

Whether it be y,z,k,p all those are just variables which can be replaced with numbers.  When I see a matrix that is all letters that is just being used as a place holder for whichever numbers they want to replace with ?

This, I now understand

The whole first row being 1,2,3 ?!?!

I don't understand how you got 19 and how to figure out a determinant from a 3x3 matrix or especially a 4x4 matrix.

That is what I meant, now onto my questions

The A has not meaning it is just a variable for something ?

If a matrix is written as such:

That you just substitute the letters with numbers ? How come when I see some matrices online they are doing the math with letters, doesn't make sense to me.  The java applet that can find out the determinant I don't understand how that is figuring it out ? I wish I could understand how to write in latex so I can write things out so it could be understood easier, as in writing out arrays etc.

I can't add the graphic in the quote do I have to upload it again ?

I don't understand with Matrices there is a A,B,T,C before the brackets. Then within the brackets there is usually a big letter with two smaller letters as in S(y,z). I remember you telling me they are variables but whenever I see a matrix math question there adding or multiplying these together how is that possible do you have to treat them as numbers ? How are they knowing what A*B is ? To get an exact idea of what I mean see this page:

http://www.analyzemath.com/Calculators/determinant_3by3.html
This brings me to another Sub-Question how do you calculate Determinant?

Arrays, what are some terms like indexInArray ? I know that an Array is a list, and that is all I know

Update: I have figured out how you add / subtract / multiple matrices.  I don't know how you divide matrices and how matrices are written, for example there is always a big letter outside of the brackets and smaller letters within the brackets.

Bobby you were or still am a programmer, maybe you can help me understand arrays.  You know I'm working with a visual based math in my 3D program that is identical to MatLab.

Well I will stick with the 3D software I taught myself the past 5 years.  The only thing I'm stuck on is this visual thing they added 2 versions ago which you can build whatever you need.  For example, causing a object distance control scalar data, if I could for a while have a tutor who could drive me along for a while I'm sure I could finally grasp it then I could drive on my own.